A place like the Right Livers' Rest was bound to draw freaks, same as molasses draws flies. 1935, George Goodchild, chapter 5, in Death on the Centre Court: By one o'clock the place was choc-a-bloc.
Swallowing certain types of poisons may cause excessive salivation. According to the National Library of Medicine, pesticides can cause excessive saliva when they are swallowed. Venom from snake bites or insect stings is another type of poisoning that can cause the malady.
The last suggestion to produce more saliva within your mouth is to drink a lot of water. It can be either bottled water or tap water with fluoride. Not only will the water wash away the sugar and leftover food particles in your mouth, but drinking water will also increase your saliva production.